A genetic study of snails, combined with other factors, suggests a migration of Mesolithic peoples from the Pyrenees to Ireland.

A recent study of the mitochondrial DNA of the Cepaea nemoralisland snail, a snail curiously common only between Ireland and the Pyrenees region of Southern France, has led researchers to conclude the possibility that ancient Mesolithic people carried the fauna with them in a migration from the French region to Ireland about 8,000 years ago.